This is it : Transparent Flat Loewe Invisio TV by Michael Friebe

Presented during 2011 iF Concept Design-biggest international competitions for students and young professionals from the areas of design, architecture, marketing and engineering-the innovative Loewe Invisio TV by Michael Friebe grab much attention from the visitors. No wonder, because this flat TV named Loewe Invisio present its best design concept with totally new transparent screen. Mouth watering, heh?

This sophisticated transparent TV blends into the home environment when not in use. Just like a simply elegant mirror. This TV is not a big black blot in standby mode, like how all television sets are. With a clear, frameless glass surface that keeps the room in its visually unaltered state, this magnificent TV features slim design. Totally become the great contemporary statement in your modern living room.

Check the description from the designer :

“As the first of its kind, the Loewe Invisio introduces technical innovation, combining conventional LCD and the latest TOLED display technology. This allows to create non-transparent / solid moving pictures with rich color reproduction and full contrast range from solid black to pristine white.”